Fixed typo.

master/datagram.h

@@ -115,7 +115,7 @@ typedef struct
     struct list_head queue; /**< master datagram queue item */
     struct list_head sent; /**< master list item for sent datagrams */
     ec_datagram_type_t type; /**< datagram type (APRD, BWR, etc) */
-    ec_address_t address; /**< receipient address */
+    ec_address_t address; /**< recipient address */
     uint8_t *data; /**< datagram data */
     size_t mem_size; /**< datagram \a data memory size */
     size_t data_size; /**< size of the data in \a data */